The cause of death of dialysis patients is mostly the emergence of serious complications: first, problems in heart disease, such as heart failure, myocardial infarction, arrhythmia and so on are relatively common, especially heart failure, the process of dialysis will be dehydrated to take off, due to the fact that they do not control their own water, it will lead to a significant increase in body weight, water significantly increased, thus increasing the burden on the heart. Secondly, it is common to have bleeding from various causes. With the use of anticoagulants during dialysis, patients are more prone to bleeding. Some patients may experience serious life-threatening bleeding such as bleeding in the digestive tract and cerebral hemorrhage. Thirdly, dialysis patients may die because of long dialysis time and insufficient dialysis, which leads to serious acid-base balance disorder in the body, as well as hyperkalemia and other internal environment disorders. Fourthly, dialysis patients may also suffer from poor resistance and serious infections, which may lead to death due to infectious shock.